轴流式血泵永磁电机全域三维温度场研究

Excessive temperature rise of axial flow blood pump will cause damage to human physiology organ's normal operation; therefore, it's necessary to know the temperature distribution of blood pump. According to computational fluid dynamics and heat transfer theory, the loss type of axial flow blood pump were analysis, and drive motor stator winding modeling were simplified, also heat coefficient of pump shell were derived. The axial blood pump three-dimensional finite element model was established by ANSYS Workbench, which steady-state thermal analysis was taken for the global FSI heat transfer model, and got the whole blood pump temperature distribution; the results show that: at rated speed, the blood pump maximum temperature rise is 0.992℃, which can meet the body's temperature requirements of blood pump. Based on the proposed thermal field model, some work is given to the analysis of thermal associated to the stator losses, the rotation speed of pump and the air gap thermal conductivity between stator and pump housing, which could help optimum design of blood pump in future application.